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United States Patent | 5,297,990 |
Renz ,   et al. | March 29, 1994 |
A filter-ventilator-arrangement for employment with clean chambers with at least one ventilator of which the pressure side is located toward an air flow chamber which is limited by boundary walls including a flow chamber formed by at least one annular channel of which one of two boundary walls at least consists of a noise-damping material. Furthermore at least an outer boundary wall consists of noise-damping material. The arrangement includes modular units having several annular channels of which the boundary walls decrease in height from the outside to the inside. Each unit has at least one filter which is arranged in a region below the flow chamber. Innermost boundary walls with inner sides thereof adjoin a plate consisting of noise-damping material. The boundary walls are secured, hanging or suspended on the cover sealing part. At least one heat exchanger lies in a suction region of the ventilator via which the return air flows.
Inventors: | Renz; Manfred (Ditzingen, DE); Bauer; Helmut (Tamm, DE) |
Assignee: | Meissner & Wurst GmbH & Co. (Stuttgart, DE) |
Appl. No.: | 828154 |
Filed: | January 30, 1992 |
Feb 01, 1991[JP] | 4103026 | |
Oct 05, 1991[DE] | 4133093 |
Current U.S. Class: | 454/187; 55/385.2; 55/473; 96/381; 181/225; 454/338; 454/906 |
Intern'l Class: | F24F 013/24 |
Field of Search: | 55/276,473,385.2 181/225 454/187,251,338,906 |
1685701 | Sep., 1928 | Blanchard | 454/906. |
4549472 | Oct., 1985 | Endo et al. | 454/251. |
Foreign Patent Documents | |||
157432 | Sep., 1984 | JP | 454/187. |
282449 | Nov., 1988 | JP | 454/906. |